Practical Photo-Micrography. 



CHAPTER I. 

 INTRODUCTORY AND HISTORICAL. 



IT would be out of place and inconvenient for the writer 

 here to enter into any elaborate apology for the Science of 

 Photo -micrography, or to occupy useful space with a lengthy 

 discourse on the reasons that led him to make a study of the 

 Science. Any one of a scientific turn of mind, and especially 

 one who has more or less mastered the science of Photography, 

 could not, on entering the microscopic world, fail to realize 

 how great a boon Photography might become to microscopy, 

 if the photographer were a good microscopist and the micro- 

 scopist a skilled photographer. Should the world ever possess 

 in one man a skilled and careful microscopist and an experi- 

 enced and versatile photographer, a very great step may be 

 expected not only towards solutions of many present enigmas 

 and towards future discoveries, but also towards a very satis- 

 factory and very convincing medium for publishing and cer- 

 tifying the solutions and discoveries. 



The potential value of Photography in this line has always 

 been admitted and often dwelt upon; but difficulties, some 

 real, some exaggerated, some imaginary, have always been cited 

 as fatal to the employment of Photography for the delineation 



